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          <li><a href="javascript:;">首页</a></li>
          <li><a href="javascript:;">人才招聘</a></li>
          <li><a href="javascript:;">公司简介</a></li>
          <li><a href="javascript:;">人在三七</a></li>
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      <!-- 推荐活动模块 -->
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        <div class="active-content">
          <h2>推荐活动</h2>
          <p class="English">ACTIVITIES</p>
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                        <h4>
                          2022可持续发展高校创新挑战赛
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                          <i class="iconfont icon-zuji"></i> <span>563</span>
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          <h2>热门栏目</h2>
          <p class="English">COLUMN</p>
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            <span><a href="javascript:;" data-index="0">这就是三七</a></span>
            <span><a href="javascript:;" data-index="1">三七人研究所</a></span>
            <span><a href="javascript:;" data-index="2">三七生活</a></span>
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              <li>
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                    <img src="./img/Play/img/_6323ebd57593a.png" alt="">
                  </div>
                  <h4>
                    2022可持续发展高校创新挑战赛
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>563</span>
                  </div>
                  <div class="player"> </div>
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                  <div class="pic">
                    <img src="./img/Play/img/_632421c491aad.jpeg" alt="">
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                  <h4>
                    2022可持续发展高校创新挑战赛
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>563</span>
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                  <div class="pic">
                    <img src="./img/Play/img/_63242266005f4.png" alt="">
                  </div>
                  <h4>
                    2022可持续发展高校创新挑战赛
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>563</span>
                  </div>
                  <div class="player"> </div>
                </a>
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              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_632422dfeb062.png" alt="">
                  </div>
                  <h4>
                    2022可持续发展高校创新挑战赛
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>563</span>
                  </div>
                  <div class="player"> </div>
                </a>
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                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_6324243b5f0e8.png" alt="">
                  </div>
                  <h4>
                    2022可持续发展高校创新挑战赛
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>563</span>
                  </div>
                  <div class="player"> </div>
                </a>
              </li>
            </ul>

            <ul class="column-item-two column-pane" style="display: none;">

              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_6324504f272bf.jpeg" alt="">
                  </div>
                  <h4>
                    2022可持续发展高校创新挑战赛
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>563</span>
                  </div>
                  <div class="player"> </div>
                </a>
              </li>
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_6324504f272bf.jpeg" alt="">
                  </div>
                  <h4>
                    2022可持续发展高校创新挑战赛
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>563</span>
                  </div>
                  <div class="player"> </div>
                </a>
              </li>
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_6324504f272bf.jpeg" alt="">
                  </div>
                  <h4>
                    2022可持续发展高校创新挑战赛
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>563</span>
                  </div>
                  <div class="player"> </div>
                </a>
              </li>
            </ul>

            <ul class="column-item-three column-pane" style="display: none;">
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_63244c5001555.jpeg" alt="">
                  </div>
                  <h4>
                    2022可持续发展高校创新挑战赛
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>563</span>
                  </div>
                  <div class="player"> </div>
                </a>
              </li>
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_63244bcd75675.png" alt="">
                  </div>
                  <h4>
                    2022可持续发展高校创新挑战赛
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>563</span>
                  </div>
                  <div class="player"> </div>
                </a>
              </li>
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_63244c5001555.jpeg" alt="">
                  </div>
                  <h4>
                    2022可持续发展高校创新挑战赛
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>563</span>
                  </div>
                  <div class="player"> </div>
                </a>
              </li>
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_63244c5001555.jpeg" alt="">
                  </div>
                  <h4>
                    2022可持续发展高校创新挑战赛
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>563</span>
                  </div>
                  <div class="player"> </div>
                </a>
              </li>
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_63244c5001555.jpeg" alt="">
                  </div>
                  <h4>
                    2022可持续发展高校创新挑战赛
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>563</span>
                  </div>
                  <div class="player"> </div>
                </a>
              </li>
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_63244c5001555.jpeg" alt="">
                  </div>
                  <h4>
                    2022可持续发展高校创新挑战赛
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>563</span>
                  </div>
                  <div class="player"> </div>
                </a>
              </li>
            </ul>
          </div>


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      <!-- 热门栏目的tab栏切换事件 -->
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        const as = document.querySelectorAll('.column-tab a')
        const panes = document.querySelectorAll('.column-item-list .column-pane')

        const columnNext = document.querySelectorAll('.recommend .w .column .next')

        const columnPrev = document.querySelectorAll('.recommend .w .column .prev')


        document.querySelector('.column-tab').addEventListener('click', function (e) {
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              columnPrev[prevNum].style.display = 'none'
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            columnPrev[1].style.display = 'none'
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      <!-- 热门栏目的图片切换事件 -->

      <!-- 精品课程 -->
      <div class="course">
        <div class="course-content">
          <h2>精品课程</h2>
          <p class="English">COURSES</p>
          <div class="course-tab">
            <span><a href="javascript:;" data-index="0">系列/专题课程</a></span>
            <span><a href="javascript:;" data-index="1">技术</a></span>
            <span><a href="javascript:;" data-index="2">市场</a></span>
          </div>
          <!-- 样品列表 -->
          <div class="course-item-list">
            <ul class="course-item-one course-pane">
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_63244a5fd1097.jpeg" alt="">
                  </div>
                  <h4>
                    用图表说话Ⅰ
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>104</span>
                  </div>
                </a>
              </li>
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_63244a5fd1097.jpeg" alt="">
                  </div>
                  <h4>
                    用图表说话Ⅰ
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>104</span>
                  </div>
                </a>
              </li>
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_63244a5fd1097.jpeg" alt="">
                  </div>
                  <h4>
                    用图表说话Ⅰ
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>104</span>
                  </div>
                </a>
              </li>
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_63244a5fd1097.jpeg" alt="">
                  </div>
                  <h4>
                    用图表说话Ⅰ
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>104</span>
                  </div>
                </a>
              </li>

            </ul>
            <ul class="course-item-two course-pane" style="display: none;">
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_6324483f8d97f.jpeg" alt="">
                  </div>
                  <h4>
                    用图表说话Ⅰ
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>104</span>
                  </div>
                </a>
              </li>
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_6324483f8d97f.jpeg" alt="">
                  </div>
                  <h4>
                    用图表说话Ⅰ
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>104</span>
                  </div>
                </a>
              </li>
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_6324483f8d97f.jpeg" alt="">
                  </div>
                  <h4>
                    用图表说话Ⅰ
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>104</span>
                  </div>
                </a>
              </li>

            </ul>
            <ul class="course-item-three course-pane" style="display: none;">
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_63244ad82951b.jpeg" alt="">
                  </div>
                  <h4>
                    用图表说话Ⅰ
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>104</span>
                  </div>
                </a>
              </li>
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_63244ad82951b.jpeg" alt="">
                  </div>
                  <h4>
                    用图表说话Ⅰ
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>104</span>
                  </div>
                </a>
              </li>
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_63244ad82951b.jpeg" alt="">
                  </div>
                  <h4>
                    用图表说话Ⅰ
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>104</span>
                  </div>
                </a>
              </li>
              <li>
                <a href="javascript:;">
                  <div class="pic">
                    <img src="./img/Play/img/_63244ad82951b.jpeg" alt="">
                  </div>
                  <h4>
                    用图表说话Ⅰ
                  </h4>
                  <div class="info">
                    <i class="iconfont icon-zuji"></i> <span>104</span>
                  </div>
                </a>
              </li>
            </ul>
          </div>
        </div>
      </div>
    </div>
  </div>

  <!--  精品课程的tab栏切换事件 -->
  <script>
    const courseAs = document.querySelectorAll('.course-tab a')
    const coursePanes = document.querySelectorAll('.course-item-list .course-pane')

    document.querySelector('.course-tab').addEventListener('click', function (e) {
      const { dataset, tagName } = e.target
      if (tagName !== 'A') return
      if (tagName === 'A') {
        for (let i = 0; i < coursePanes.length; i++) {
          coursePanes[i].style.display = 'none'
        }
        const index = dataset.index
        coursePanes[index].style.display = 'flex'
      }
    })










  </script>

  <script>
    let num = 2




  </script>


  <!-- 高校合作 -->
  <div class="school">
    <div class="w">
      <div class="school-content">
        <h2>高校合作</h2>
        <p class="English">COLLEGE-ENTERPRISE COOPERATION</p>
        <ul class="school-item">
          <li>
            <a href="javascript:;">
              <div class="pic">
                <img src="./img/Play/img/_632932af9b32d.jpeg" alt="">
              </div>
              <div class="text">
                <h4>
                  产学研
                </h4>
                <p>三七互娱为高校学生定制体系化的人才培养计划，以实训课形式开展，由公司资深专家组成精英讲师团队，聚焦人才精准培养。</p>
              </div>
            </a>
          </li>
          <li>
            <a href="javascript:;">
              <div class="pic">
                <img src="./img/Play/img/_632933c9b32c7.png" alt="">
              </div>
              <div class="text">
                <h4>
                  产学研
                </h4>
                <p>三七互娱为高校学生定制体系化的人才培养计划，以实训课形式开展，由公司资深专家组成精英讲师团队，聚焦人才精准培养。</p>
              </div>
            </a>
          </li>
          <li>
            <a href="javascript:;">
              <div class="pic">
                <img src="./img/Play/img/_6329355404511.jpeg" alt="">
              </div>
              <div class="text">
                <h4>
                  产学研
                </h4>
                <p>三七互娱为高校学生定制体系化的人才培养计划，以实训课形式开展，由公司资深专家组成精英讲师团队，聚焦人才精准培养。</p>
              </div>
            </a>
          </li>
          <li>
            <a href="javascript:;">
              <div class="pic">
                <img src="./img/Play/img/_6329341b006bd.png" alt="">
              </div>
              <div class="text">
                <h4>
                  产学研
                </h4>
                <p>三七互娱为高校学生定制体系化的人才培养计划，以实训课形式开展，由公司资深专家组成精英讲师团队，聚焦人才精准培养。</p>
              </div>
            </a>
          </li>
        </ul>
      </div>
    </div>
  </div>

  <!-- 合作院校 -->
  <div class="partner">
    <div class="w">
      <div class="partner-content">
        <h2>合作院校</h2>
        <p class="English">COOPERATIVE ACADEMY</p>
        <ul class="partner-item">
          <li>
            <img src="./img/Play/img/11.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/12.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/13.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/14.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/15.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/16.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/17.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/18.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/19.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/20.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/21.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/22.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/23.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/24.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/25.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/26.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/27.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/18.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/15.png" alt="">
            <p>中山大学</p>
          </li>
          <li>
            <img src="./img/Play/img/19.png" alt="">
            <p>中山大学</p>
          </li>
        </ul>
      </div>
    </div>
  </div>

  <!-- 合作联系 -->
  <div class="link">
    <div class="w">
      <div class="link-content">
        <h2>合作联系</h2>
        <p class="English">CONTACT US</p>
        <ul class="link-item">
          <li>
            <a href="javascript:;">
              <i class="iconfont icon-geren1"></i> <span>邀请嘉宾进校
              </span>
            </a>
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